Energy Spectra Of Charged Particles Research Articles

Energy spectra of charged particles emitted following the absorption of stopped negative pions in 12C nuclei

Abstract The energy spectra of charged particles (p, d, t, 3 He, 4 He and Li nuclei) emitted following the absorption of stopped negative pions in carbon targets of different thicknesses (1.227, 0.317, 0.0202 g/cm 2 ) have been measured from the experimental threshold energy of about 0.5 MeV up to the kinematical limit of about 100 MeV. The experiments have been carried out at the biomedical pion channel πE3 of the Swiss Institute of Nuclear Research (SIN). The measured spectra have been corrected for particle and energy losses in the target. They are compared with experimental data obtained by other authors and with the results of intranuclear cascade calculations. Thick target yields have been calculated from the measured spectra. They are of radiobiological importance in determining the biological effect of pion irradiation of tumours.

Measurement of energy spectra of charged particles emitted after the absorption of stopped negative pions in carbon

Energy spectra of charged particles (protons, deuterons, tritons, 3He, 4He and lithium nuclei) emitted after the absorption of stopped negative pions in a thin polyethylene target of 20 mg/cm 2 have been measured with high accuracy from the experimental threshold energy (of about 0.5 MeV) up to the kinematical limit of about 100 MeV.

Electrodisintegration of lithium

Energy spectra of charged particles produced by electron and bremsstrahlung bombardment of 6Li and 7Li were measured by means of a magnetic spectrometer and solid-state detectors. Assuming that all transitions leave the residual nucleus in the ground state, the photonuclear cross sections were obtained using both bremsstrahlung and E1 virtual photon spectra. Comparison of the present real and virtual photon results is made with those of previous experiments.

Analysis of integrated charged particle energy spectra from gridded electrostatic analyzers

Analysis of integrated charged particle energy spectra from gridded electrostatic analyzers

Research directed toward the study of ionic and neutral species in thermal plasmas: H Heil and B W Scott,Rep AFCRL-67-0500, AD-662636, Sep 1967, 165 pages, ( Sci Tech Aerospace Reps, 6 (6), 890, N68-15633).

Abstract : Two sets of experiments were designed to study the gas discharge in cesium plasma thermionic converters. The first experiments measured the energy spectra of charged particles extracted through a small hole in the anode of an operating energy converter. From these ion and electron spectra the temperatures were deduced and the emitter sheath height was measured. The se The second experiments were to investigate cross sections relevant to an understanding of the ionization processes present in the converter. The ionization and charge exchange cross sections were studied in detail. In addition to the various cross sections, the reflection of zero energy electrons at surfaces was investigated both by experiment and by computer experiment. Results and experimental techniques are described in detail. (Author)

Energy Spectrum of Charged Particles Emitted Following Muon Capture inSi28

Results of a high-resolution study of the charged-particle energy spectrum resulting after ${\ensuremath{\mu}}^{\ensuremath{-}}$ capture in ${\mathrm{Si}}^{28}$ are presented. The spectrum, attributed mainly to proton emission, exhibits a low-energy cutoff at 1.4 MeV and a maximum at about 2.5 MeV from which it decreases approximately exponentially with a decay constant of 4.6 MeV. A branching ratio of 0.15\ifmmode\pm\else\textpm\fi{}0.02 charged particle per capture was determined.

Ca 40(n,α o) Reaction energy spectra and differential cross sections

Experiments were recently carried on using silicon junctions as target- detectors to measure the energy spectra of charged particles from (n,x) reactions in Si28 and Si29. The maximum Q value for charged-particle emission in (n,x) reactions from silicon isotopes, contained in the detector, is --0.02 Mev for the Si29 (n, alpha o) reaction. The Ca40(n alpha o) reaction was investigated in order to extend the measurements for the energy spectra for the (n, charged particles) reaction. The Q value for the Ca40(n, alpha o) reaction is 1.75 Mev, which is in a region where the Coulomb barrier is not too high to prevent the alpha emission. The neutron source was a liquid-air-cooled D2O ice target bombarded with deuterons accelerated by a Van de Graaff accelerator.